| 摘要 |
Identification Apparatus (31, 32) for providing identification information relating to a gemstone (10), is arranged to obtain a measurement in absolute or relative terms of the length of each of plural sides of a table facet (14) of a gemstone, and automatically to use the plural measurements to provide a fingerprint for the gemstone. The fingerprint includes a measure of the length of a given side of the table facet as a proportion of the total of the lengths of all the sides of the table facet and a measure of the length of each side of the table facet. |
